Kate Hudson's & Halle Berry's Nasty Splits!

To the public, Halle Berry and Kate Hudson’s lives may seem perfect. In private, though, the actresses are both on the brink of nasty splits from their respective partners, Olivier Martinez and Matthew Bellamy, the fathers of their second children.

The trouble was evident for both women on Oscars night — they both attended events dateless, and without their wedding and engagement rings.

For Kate, who got engaged to the Muse frontman in 2011, it’s a wandering eye that may be causing trouble. At the Vanity Fair Oscar party, she flirted with Leonardo DiCaprio, which she continued four days later at another event. “They were whispering in each other’s ear and being very touchy,” an eyewitness tells Star. “And Kate was giggling at everything Leo said.”

The 34-year-old has also been getting close to Dancing With the Stars choreographer Derek Hough — and Matthew is not pleased. “Lack of trust has been a huge source of contention between them,” a source reveals. “The relationship is definitely falling apart, and the wedding is off for now.”

Halle, who’s been married three times, hasn’t been seen in public with her husband since Dec. 7, and for them, the problem is constant fighting. “They have had some extremely vicious arguments, and every small thing is causing issues,” an insider says. Adding to their troubles, is Olivier’s jealousy. “His paranoia has completely taken over,” the source adds.

For more on Kate’s and Halle’s relationship drama, pick up the latest issue of Star on newsstands now!